We evaluate enhanced mass detection possibilities with electrostatic actuation of a mechanical microoscillator positioned at a fluid-liquid interface. An analytical model is used to simulate the rotational motion of such configuration inside a microchannel either completely filled with two immiscible liquids, or partially filled forming an air-liquid interface. Simulation results show that improvements in sensitivity can be obtained through the use of fluid-liquid interfaces. For point mass detection, sensitivities of at least 9–15Hz/ng can be achieved using liquid-liquid interfaces. For air-liquid interfaces, it is conceivable to detect point masses in the order of tens of picograms.
- Heat Transfer Division
Microresonator Concept for Mass Detection in Liquids
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Allievi, A. "Microresonator Concept for Mass Detection in Liquids." Proceedings of the ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels, Volume 1. Edmonton, Alberta, Canada. June 19–22, 2011. pp. 579-586. ASME. https://doi.org/10.1115/ICNMM2011-58032
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